How to find out zeros and their indices in a matrix?

I have an input matrix of size 3*13 double:

input=[0 0 1 0 0 0 1 1 1 0 0 0 0;
       0 1 0 0 1 1 0 0 0 1 0 1 0;
       0 1 1 1 1 0 0 0 1 0 0 1 0];   

I want to know how many zeros subsequently have in

input(2,:)

The output should be:

output=[1 2 3 1 1];

I also want to know their starting index of zeros. It should look like:

index=[1 3 7 11 13];

How can i solve this problem?

Answer 1

[Bruno Luong]

v=input(2,:)>0; % remove >0 if your matrix contains only 0 or 1

d = diff([1, v, 1]);
index = find(d==-1)
output = find(d==1)-index

[SM]

Thank you very much!

Answer 2

[Matt J]

One way is to use this FEX submission,

https://www.mathworks.com/matlabcentral/fileexchange/78008-group1s

H=group1s(~input(2,:));

output=histcounts(H); output(1)=[];
[~,index]=unique(H); index(1)=[];

[SM]

Thank you, Matt!